The grass starter is a deer growing from a fawn to an adult. As a defence mechanism it decorates itself with vines that grow poisonous berries.
Berrylin = Berry + lin
Vervine = Vervain + vine
Doeberry = Doe + Berry
The Fire starter is a martial arts fire slug. As it evolves it gains skills in martial arts until at it final evolution it has mastered fire and ghost breathing.
Smoggot = Smog + maggot
Eslargo = Escargot + lava
Ghaspyro = Ghast + gastropod + pyro
The water starter is a squid evolving its drowning skills. By the end it uses its tongue which extends to double its length to grab boats and submarines and drown their passengers.
Squidip = Squid + dip
Squidunk = Squid + dunk
Squidrown = Squid + drown
by Martian_Playz